
I have been breeding toys for many years and I know that the smaller breeds are prone to inertia.
I don't know any vet that has breeding knowledge. They just get bitches with problems and have probably never whelped a bitch. Their expertise is in sections when a bitch has problems, and this is their area of expertise. I would be going to my vet and saying I want a section NOW. My bitch, my choice. 64 days is far too long for a toy. Mine normally go 56 days, perfectly viable whelps.
I would be rushing your girl to a vet who is willing to carry out your wishes. No wonder she looks sad, poor girl. I am genuinely worried about her.